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Looking to watch The Big Bang Theory Season 5 Episode 13 online? TV Fanatic is your destination for every paid and free streaming option of the The Big Bang Theory S5E13 full episode from 2 affiliates.

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Episode Details

The Big Bang Theory Season 5 Episode 13: "The Recombination Hypothesis"

Leonard asks Penny out on a date this week, causing everyone else to wonder how life might change it it goes well. It's the show's 100th episode!